You are welcome! Thanks for your Support.
Originally, Youtube used the Gracenote system for Audio Fingerprinting, but I don't know what they use now and Gracenote don't mention video fingerprinting. It is possible to install such a system on Dtube, but the fingerprinting process would have to be somehow inserted in between the end points of the network. I don't know enough about the details to know how easy/difficult that would be.